As the diaphragm contracts and moves downward, there is ________. Question content area bottom Part 1 A. negative thoracic pressure with air moving out B. negative thoracic pressure with air flowing in C. positive thoracic pressure with air flowing out D. positive thoracic pressure with air flowing in
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3. When the diaphragm contracts and moves down, what happens to the lungs? O A. expanding with air O B. shrinking air out O C. pushing air out O D. moving air out
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a. What happens to the volume of the thoracic cavity when the diaphragm contracts/flattens? (1 point) b. How does this volume change affect the pressure in the thoracic cavity and the flow of air? (1 point)
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In negative pressure filling, air moves into the lungs when a. the volume of the thoracic cavity increases. b. the pressure in the thoracic cavity decreases. c. air is forced down the trachea by muscular contractions of the mouth and pharynx. d. all of the above occur. e. only a and b occur.
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